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[SPARK-24625] put all the backward compatible behavior change configs under spark.sql.legacy.* - Spark - [issue]
...Recently we made several behavior changes to Spark SQL, to make it more ANSI SQL compliant or fix some unreasonable behaviors. For backward compatibility, we add configs to allow users fallb...
http://issues.apache.org/jira/browse/SPARK-24625    Author: Wenchen Fan , 2020-02-03, 06:36
[SPARK-25531] new write APIs for data source v2 - Spark - [issue]
...The current data source write API heavily depend on SaveMode, which doesn't have a clear semantic, especially when writing to tables.We should design a new set of write API without SaveMode....
http://issues.apache.org/jira/browse/SPARK-25531    Author: Wenchen Fan , 2020-02-03, 06:39
[SPARK-26448] retain the difference between 0.0 and -0.0 - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-26448    Author: Wenchen Fan , 2020-02-03, 06:40
[SPARK-27746] add a logical plan link in the physical plan - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-27746    Author: Wenchen Fan , 2020-01-31, 18:38
[SPARK-27747] add a logical plan link in the physical plan - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-27747    Author: Wenchen Fan , 2020-02-01, 05:16
[SPARK-28344] fail the query if detect ambiguous self join - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-28344    Author: Wenchen Fan , 2020-02-01, 05:18
[SPARK-30622] commands should return dummy statistics - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-30622    Author: Wenchen Fan , 2020-01-31, 03:43
[SPARK-30192] support column position in DS v2 - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-30192    Author: Wenchen Fan , 2020-01-31, 06:52
[SPARK-29501] SupportsPushDownRequiredColumns should report pruned schema immediately - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-29501    Author: Wenchen Fan , 2020-01-31, 08:30
[SPARK-30680] ResolvedNamespace does not require a namespace catalog - Spark - [issue]
http://issues.apache.org/jira/browse/SPARK-30680    Author: Wenchen Fan , 2020-01-30, 18:35